/Engine/Source/Runtime/Online/HTTP/Public/GenericPlatform/GenericPlatformHttp.h
Utility for escaping a string used in the HTTP user agent. Removes disallowed characters.
optionalFString: If unset: we are unable to get information from the operating system. If set: the proxy address set by the operating system (may be blank)
static [TOptional](API\Runtime\Core\IO\TOptional)< [FString](API\Runtime\Core\Containers\FString) > GetOperatingSystemProxyAddress()